Preparation and performance of porous framework reinforced mixed-matrix membranes for CH4/N2 separation
LIANG Yuntao
WANG Yongjing
FENG Wenbin
XU Jingkai
XIAO Wei
Abstract：This study addresses the efficient utilization of coalbed methane,a methane-rich unconventional natural gas,by developing a novel membrane separation technology.A reinforced mixed matrix membrane was created using electrospin-ning to combine polyvinylidene fluoride(PVDF)with a block polymer(SBS)and metal-organic framework material(Ni-MOF-74).Notably,the PM20 membrane,incorporating 20％Ni-MOF-74,demonstrated exceptional mechanical and sep-aration properties.It exhibited a tensile strength of 29.5 MPa,which is approximately 50％higher than that of pure SBS resin membranes.In terms of CH4 permeation,the PM20 membrane achieved a remarkable rate of 97 Barrer and a CH4/N2 selectivity of 4.03,significantly surpassing other membrane materials.For CH4-N2 binary gas mixtures,the membrane also exhibits high CH4 permeability and selectivity.This advancement in membrane technology not only enhances the capture and utilization rate of methane in low-concentration coalbed gas but also contributes to the broader goals of sustainable en-ergy use and greenhouse gas emission reduction.The study's findings hold significant promise for the future of unconven-tional energy sources and offer new directions in coalbed gas treatment and methane enrichment technologies.
Keywords：mixed matrix membraneCH4/N2 separationMOF fillersporous supportperformance compatible
Publication Date：2025-01-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 340-348 )